A043553 - OEIS

A043553

Row sums of convolution triangle A030524.

1, 7, 43, 250, 1420, 7990, 44800, 250900, 1404700, 7864000, 44026000, 246481000, 1379950000, 7725850000, 43254430000, 242167300000, 1355815600000, 7590769900000, 42498250000000, 237933871000000, 1332114307000000

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..21.

Wolfdieter Lang, On generalizations of the Stirling number triangles, J. Integer Seqs., Vol. 3 (2000), #00.2.4.

FORMULA

G.f.: x*(1-3*x+3*x^2)/(1-10*x+30*x^2-30*x^3) = g1(4, x)/(1-g1(4, x)), g1(4, x) := x*(1-3*x+3*x^2)/(1-3*x)^3 (g.f. of first column of A030524).

CROSSREFS

Cf. A030524.

Sequence in context: A193656 A125344 A163869 * A049609 A161728 A358682

Adjacent sequences: A043550 A043551 A043552 * A043554 A043555 A043556

KEYWORD

easy,nonn

AUTHOR

Wolfdieter Lang

STATUS

approved